Malicious PDF — malware analysis report

Static analysis result for SHA-256 985da04f8daa5c35…

MALICIOUS

PDF

80.5 KB Created: 2021-03-17 02:43:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8b27ad6de7640183363ba1aaf26dbb5d SHA-1: 444ccd05303d6271a2d863efa7c2c3425693bc66 SHA-256: 985da04f8daa5c35adead0d2e152a6a4ca440df6a950116649b91634110ff1fb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links on disposable domains, likely to obscure malicious destinations. The primary malicious URL identified is https://midufefew.ru/wix?keyword=unicorn+goat+yoga, which is likely used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://midufefew.ru/wix?keyword=unicorn+goat+yoga PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380090/normal_602b84e5e8732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413345/normal_6030894fbfa21.pdfIn PDF document text
    • http://guparob.mywebcommunity.org/62973883016.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449602/normal_5fff6a165d79f.pdfIn PDF document text
    • https://cdn.sqhk.co/wafavalufa/cxYhghf/non_disclosure_agreement_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480402/normal_5ff52bab43086.pdfIn PDF document text
    • https://cdn.sqhk.co/povuguzuloga/hhapjfO/my_talking_tom_2_game_download_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/goxufime/iaKNjhW/56339780409.pdfIn PDF document text
    • https://cdn.sqhk.co/nivuduful/rN4hehf/ferazusaviwapubujoja.pdfIn PDF document text
    • http://zomaragexavope.sportsontheweb.net/nisajo.pdfIn PDF document text
    • https://cdn.sqhk.co/xurakipigub/jjaIoeb/crazy_bowling_3d_review.pdfIn PDF document text
    • https://cdn.sqhk.co/saxezekobida/heidhcK/sirimuwamovaruwifagi.pdfIn PDF document text
    • https://cdn.sqhk.co/purilusevike/cgdDrub/gun_sounds_effects.pdfIn PDF document text
    • https://cdn.sqhk.co/rowunozimop/fDKRLgV/daily_planner_excel_template_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419629/normal_5fe39d260eab1.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/timosagotiviwadodiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/widofafane/oral_b_1000_vs_1500_vs_3000.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/gamezer_guide_hack.pdfIn PDF document text
    • http://xezaretidatoro.onlinewebshop.net/http_www._naturalnews._com_specialreports_sunlight.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/free_video_blog_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/robotic_arm_3d_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce4aaa84-626e-4365-9e4d-06d1ed4204f9/garmin_gpsmap_78sc_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee624190-2e5a-43ce-8202-ab0844c1f7fe/very_short_english_stories_for_preschoolers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8665e85e-d3e6-4f3c-b3d6-5d0e5ee45688/11766099399.pdfIn PDF document text
    • http://zaduzos.myartsonline.com/39974774446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23481cf3-c74c-4c4e-bbec-0b83ccf43081/statistics_worksheets.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CB 4520 bytes
SHA-256: 752cc65192da87a35edf17dac14a13e265f88b5a89fe58501292f93c472114f5
font_01_sfnt_off00010024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10024 11296 bytes
SHA-256: f6008b23723a734fada3dccdc9694bb57891af36d27b26f91415aee2006fc8bd
font_02_sfnt_off000126c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e